Container and method of making



Aug. 2, 1966 c. J. SMITH 3,263,636

CONTAINER AND METHOD OF MAKING Original filed Sept. 11, 1961 5Sheets-Sheet l INVENTOR.

BY 5km M Aug. 2, 1966 c. J. SMITH 3,253,635

CONTAINER AND METHOD OF MAKING Original Filed Sept. 11, 1961 5Sheets-Sheet :3

Aug. 2, 1966 c. J. SMITH 3,263,636

CONTAINER AND METHOD OF MAKING Original filed Sept. 11, 1961 5sheets-Sheet s United States Patent 3,263,636 CONTAINER AND METHOD OFMAKING Clarence J. Smith, 907 23rd St., Rockford, Ill. Originalapplication Sept. 11, 1961, Ser. No. 137,110, now Patent No. 3,221,922,dated Dec. 7, 1965. Divided and this application Mar. 29, 1965, Ser. No.443,340

8 Claims. (Cl. 113--80) The present invention relates to containerscommonly known as tin cans. In general, a container of this charactercomprises a container body closed at each end by a cover secured to thecontainer body by an end seam in which a peripheral hook on the cover isfolded around a hook on the body.

This application is a division of my copending application Serial No.137,110, filed September 11, 1961, now issued as Patent No. 3,221,922,dated December 7, 1965.

One object is to provide an improved container of the above character,designed to be opened by cutting through a circumferential portion of acover hook which overlies a coacting body hook on the container andhaving an improved construction which affords significant advantages inthe manufacture of the container and significant advantages in the wayof functional capabilities and features of the container provided.

Another object is to provide a container capable of being easily openedby cutting through a cover book of the container over the coacting bodyhook and having an improved construction which provides a superiorsealing of each container cover to the container body through mechanicalengagement of the cover with the body.

Another object is to provide an improved container of the characterrecited in the above objects having an improved construction whichutilizes an annular portion of a typical container cover to produce atight, highly effec tive mechanical seal with the container body and toeffect a highly efficient and effective guiding of a cutter to open thecontainer by cutting through an annular portion of the cover hook whichoverlies a coacting body hook.

Another object is to provide a container of the character recited in thepreceding objects in which a sealing com pound is disposed in an optimumsealing space within an end seam of the container and positivelyconfined against escape from the optimum sealing space by means of animproved construction which also forms a highly effective mechanicalseal between the associated container cover and body and which serves toavoid exposure of the sealing compound upon opening of the container byfully enclosing the compound within structure of the end seam whichremains attached to the container body after severing of the cover hookto open the container.

Another object is to provide a container of the character recited in theprevious objects having an improved construction which facilitatesefficient, economical manufacture of the containers on a rapid massproduction basis, while at the same time effectively avoidingoverstressing or abrasion of the container structure including thatwhich is shaped to form the end seam.

Another object is to provide a container of the character recited in thepreceding objects having an improved construction which affords decidedadvantages in manufacturing the container, particularly with referenceto the incorporation of sealing compound into each end seam of thecontainer in a manner which assures a highly effective seal between thecontainer body and each cover of the container, while at the same timeproviding for eificient advantageous opening of the container by cuttingthrough a cover hook and over the adjacent body hook on the container.

Another object is to provide an improved container as recited in thepreceding objects which is capable, after be- 3,263,636 Patented August2, 1966 ing opened, of affording special advantages as a reclosablecontainer by virtue of an improved construction of the container thatfacilitates easy replacement of the severed cover and servesadvantageously to forcefully, yet yieldably, retain the replaced coveron the container body.

Another object is to achieve the previously recited objects by means ofimproved container structure well adapted for economical manufacture.

Another object is to provide a new and improved method of manufacturingthe improved container recited in the preceding objects.

Other objects and advantages will become apparent from the followingdescription taken in relation to the drawings which illustrate acontainer constructed in accordance with the invention.

In the drawings:

FIGURE 1 is a fragmentary transverse sectional view of a partiallyformed container cover illustrating one step in the manufacture of thecontainer and showing a fragmentary section of coacting dies used informing the container cover;

FIG. 2 is a transverse sectional view of a container cover similar toFIG. 1 but showing a curl formed on the periphery of the cover asanother step in the production of the container;

FIG. 3 is a transverse fragmentary sectional view of a container covershowing the cover inverted with reference to the position of the coverin FIG. 2 and illustrating the manner in which the shaping of the coverserves most advantageously in effecting location of a sealing compoundin a desired optimum position on the cover;

FIG. 4 is a transverse fragmentary sectional view illustrating initialplacement of a cover in covering relation to one end of a previouslyform-ed container body;

FIG. 5 is a fragmentary transverse sectional view showing an end seam ofthe improved container after completion of the first of two rollingope-rations in the formation of a typical end seam;

FIG. 6 is a view similar to FIG. 5 in which the die used in the firstrolling operation is shown spaced outwardly from the end seam structure;

FIG. 7 is a view similar to FIG. 6 but showing the die used in thesecond rolling operation and showing the end seam as completed by thesecond rolling operation;

FIG. 8 is a perspective view of an improved container constructed inaccordance with the invention;

FIG. 9 is a transverse sectional view taken with reference to the line9-9 of FIG. 8 and illustrating the positional relationship to the endseam of a cutter used to open the container;

FIG. 10 is a sectional view similar to FIG. 9 but illustrating theaction of the cutter in cutting through the cover hook over the bodyhook to open the container;

FIG. 11 is a transverse sectional view generally similar to FIG. 10 butillustrating the cover displaced axially from its normal position on thecontainer after severing of the cover hook, as illustrated in FIG. 10;

FIG. 12 is a perspective view showing a container incorporating anadditional feature of the invention which enhances the utility of thecontainer as a reclosable cannister after it has been opened;

FIG. 13 is a fragmentary sectional view illustrating the second rollingoperation in the formation of an end seam of the container of FIG. 12;

FIG. 14 is a perspective view of a chuck used in the seaming operationof FIG. 13

FIG. 15 is a fragmentary sectional view illustrating the opening of thecontainer of FIG. 12 with a can opener;

FIG. 16 is a fragmentary perspective view showing a severed covershifted upwardly from its normal position in relation to a containerbody;

3 FIG. 17 is a fragmentary sectional view taken with reference to theline 17l7 of FIG. 12 and showing the severed cover replaced on thecontainer body; and

FIG. 18 is a fragmentary sectional view taken with reference to the line1818 of FIG. 17.

The container 20 constructed in accordance with the invention andillustrated in FIG. 8 comprises a cylindrical body 22 closed at each endby a cover 24 secured to the body by an end seam 26.

As shown in FIGS. 7 and 9, each end seam 26 comprises a body hook 28formed on the adjacent end of the body 22, and a cover hook 30interfolded with the body hook and joined to an outwardly extending,annular chuck wall 32 fitted into the adjacent end of the body 22 andadjoining the central portion 34 of the cove-r. In this description, thebody hook 28 will be regarded as including an annular flange portion 36connected through a curved connecting portion 38 of the body hook withthe main portion of the body 22. The flange portion 36 of the body hookencircles the main portion of the body and has substantial axial length,as shown.

The cover hook 30 will be regarded in this description as including allthe structure of the cover which extends beyond the chuck wall 32. Thecover hook 30 includes an inner fold 40 extending between the body hookflange 36 and the main portion of the body 22, an outer fold 42encircling the body hook flange 36, and an annular connecting segment 44of the cover hook which joins with the chuck wall 32.

As will presently appear, the connecting segment 44 of the cover hookhas a special shaping which affords very material advantages in themanufacture of the container while at the same time affordingsignificant advantages in the use of the container.

For convenience in description, the connecting segment 44 of the coverhook can be regarded as including an annular cutter guiding portion orsegment 46 joined to the outer cover hook fold 42 and being connected tothe chuck wall 32 by an annular abutment portion or segment 48 of theconnecting segment. The connecting segment 44, including the cutterguiding portion 46 and the abutment portion 48, is shaped in a manner tobe described, which effects, as an incident to rolling of the end seam,of which the cover hook is a part, a tight, mechanical seal between thecover hook and the coacting body hook 28.

The advantageous shaping of the connecting segment 44 of the cover hookcan be most easily described and visualized with reference to the methodof making the container which is illustrated in FIGS. 1 to 8.

The body 22 of the container 20 is fashioned in accordance withconventional practice and is shaped as illustrated in the fragmentary,transverse sectional view of FIG. 4 to have an outwardly flaredincipient body hook on each end, which for convenience in description isidentified by the number 28 applied to the completely formed body hookin the finished container.

A typical cover 24 is stamped from sheet metal by special stamping dies51, 53, to have the shape illustrated in the fragmentary, transversesectional view of FIG. 1. Except for the use of the special dies 51, 53,this stamping operation is performed in a conventional manner.

The special dies 51, 53, differ from conventional dies used for the samepurpose in the shaping of the portions of the dies 51, 53 illustrated inFIG. 1. The stamping operation forms the chuck wall 32 and forms theincipient cover hook 30 to have the shape illustrated in FIG. 1. For thepurpose of description and identification the incipient cover hook 30can be regarded as being a seaming panel. The specially shaped portionsof the dies 51, 53 illustrated in FIG. 1 effect the desired shaping ofan annular portion of the incipient cover hook 30 which becomes thepreviously mentioned cutter guiding segment 46 of the finished coverhook. For convenience this swaged annular portion of the incipient coverhook is 4 identified by the number 46 in FIGS. 1 to 5. The side or faceof each cover 24 which ultimately confronts the interior of thecontainer to be formed will be referred to as the inner face or side ofthe cover, which appears on the underside of the incipient cover asillustrated in FIGS. 1 and 2.

As shown, the portion of the inner die 53 which cooperates with theouter die 51 to swage the cutter guiding segment 46 defines arectilinear groove 55 which opens in an axially outward direction. Theouter die 51 defines an annular protuberance 57 which registers radiallywith the inner die groove 55, as shown in FIG. 1. Preferably, the outerdie protuberance 57 defines a sharp annular ledge 59 extending to theradially inner edge of the protuberance. This ledge 59 is spacedradially outward of the radially inward wall 61 of the inner die groove55. The side 63 of the protuberance 57 opposite from the sharp ledge 53slopes radially outward from the inner die groove 55, as shown.

Preferably, the surface 65 on the inner die 53 encircling the groove 55is offset axially somewhat inward of the inner die surface 67 on theradially inward side of the groove 55, as shown. Corresponding surfacesof the outer die 51 are similarly shaped.

Swaging of the annular cover hook segment 46 by the dies 51, 53, as anincident to stamping of the incipient cover forms at once an annularprotuberance 60, FIG. 2, on the inner face of the incipient cover hook30 and an annular groove 62 which opens axially outward. Upon formationof an end seam 26, the swaged annular portion 46 of the cover hook isturned so that the groove 62 which initially opens axially outwardultimately opens in a radially outward direction.

Preferably, the swaged segment 46 is shaped by the dies 51, 53 so thatthe radially inward side surface 64 of the groove 62 has a relativelysteep slope in relation to the medial plane of the cover, and theradially outward side surface 66 of the groove 62 has a less steep sloperelative to the medial plane of the cover.

The swaged annular cover segment 46, FIG. 2, has a carefully determinedradial spacing from the chuck wall 32 which provides advantageouspositional relationships of the components of the end seam to be formed,as will be presently described. A fiat portion 48 of the incipient bodyhook 30 intervening between the chuck wall 32 and the swaged segment 46subsequently becomes the abutment segment 48 of the completed coverhook, FIGS. 7 and 9, and has a radial width somewhat less than theradial thickness of the end seam to be formed.

As stamped by the dies 51, 53, the incipient cover 24 defines on itsouter periphery a partially formed curl 52, as shown in FIG. 1. In asecond operation, the incipient curl 52 is turned further inwardradially in a conventional manner to have the form illustrated in FIG.2.

The next operation is the placement of a sealing compound on the innerface of each cover 24 to subsequently form a seal within the end seam tobe produced. For depositing of the sealing compound, a cover is invertedfrom the position shown in FIG. 2 to occupy the position illustrated inFIG. 3. A suitable sealing compound 68 is deposited on the inner face ofthe incipient cover hook 30 between the protuberance 60 and the curl 52.This is readily accomplished with the aid of gravity which causes thesealing compound in its initially liquid form to distribute itself alongthe cover hook 30 between the protuberance 60 and the curl 52. Mostsignificantly, the annular protuberance 60 forms a dam which preventsthe sealing compound from spilling over onto the inner face of the coverradially inward of the protuberance 60. As will presently appear, thisassures confinement of the sealing compound to a position on the coverwhich effects a most advantageous location of the compound within thecontainer end seam 26 of which the cover subsequently becomes a part. I

Attachment of a cover 24 to a body 22 begins by place- "merit of thecover in covering relation to one end of the body, as illustrated inFIG. 4.

The cover and body are then seamed together in two rolling operations.The outer swaging roller 77 used in the first seaming operation isillustrated in FIG. 6. The contour of the roller 77 is identical to thatof a conventional end seaming roller, except for formation in the roller77 of a recess 76 which avoids direct engagement of the roller with thejuncture of the cutter guiding segment 46 with the fiat portion 48 ofthe cover hook during the first seam rolling operation, which is carriedout in a conventional manner. As illustrated in FIGS. 5 and 6, the firstseam rolling operation swings the body hook flange 36 toward its finalposition and turns the curl 52 under the flange 36. At the same time,the swaged segment 46 is turned downwardly at its circumferentialjuncture with the segment 48 of the cover hook taking shape.

The second seam rolling operation is carried out in a conventionalmanner, using the special seam roller 78, FIG. 7, which differs from aconventional roller only by the formation in the roller 78 of a recess80 which avoids application of roller pressure to the junctures of thesegments 46, 48 of the cover hook.

The radially inward force applied by the roller 58 to the outer fold 42of the cover hook forces the inwardly projecting annular protuberance 60of the cover hook into tight circumferential engagement with the curvedconnecting portion 38 of the body hook 28 as the body hook and coverhook are pressed into tight interfolded relation to each other, FIGS. 7and 9.

The rolling of an end seam 26 sharply increases the curvature of thejuncture of the swaged segment 46 of the cover hook with the abutmentsegment 48 of the cover hook to leave the abutment segment 48 in asubstantially flat condition and to produce on the cover hook an annularprotuberance 82 that projects radially outward beyond the groove 62,which is turned to open radially outward.

The radial Width of the fiat abutment segment 48, previously determinedby the radial spacing of the swaged segment 46 from the chuck wall 32,is such that the maximum radius of the proturberance 82 with respect tothe central axis of the container is limited so as not to exceed thecorresponding maximum radius of that portion of the cover hook locatedaxially inward of the groove 62 and constituting the outer fold 42 ofthe cover hook. Preterably, the just mentioned maximum radius of theprotuberance 82, FIGS. 7 and 9, is slightly less than the correspondingmaximum radius of the cover hook outer fold Hence, the swaged cutterguiding segment 46 of the cover hook is protected effectively from axialblows by the flat abutment segment 48 of the cover hook and is protectedfrom radial blows by the relatively large outer fold 42 of the coverhook, which has a diameter at least equal to and preferably exceedingthat of the protuberance 82.

As previously mentioned, the fact that the protuberance 60, formed bythe swaged segment 46, initially extends inwardly from the portion ofthe cover hook, that ultimately becomes the outer cover hook fold 42,causes the protuberance 60 to bear tightly against the body hook as thecover hook fold 42 is rolled toward the container body in the endseaming operation. The tight mechanical seal thus formed between thecover hook protuberance 60 and the body hook 28 not only serves tocontribute directly to the production of a tight seal between the coverand body, but also serves to great advantage in assuring confinement ofthe sealing compound 68 to the optimum desired sealing space within theseam. 26 formed. As previously described in relation to FIG. 3, theprotuberance 60 initially serves to advantage in preventing the sealingcompound 68 in its liquid state from spilling over onto portions of thecover radially inward of the protuberance 60. Similarly, when the endseam 26 is rolled, engagement of the protuberance 60 with the body hook,as described, precludes squeezing of the sealing compound .past theprotuberance 60* so that it does not intrude into interstices betweenportions of the cover hook and body hook which are subsequentlyseparated from each other upon opening of the container.

Moreover, as will presently appear, a portion of the cover hook whichdefines the protuberance 60 remains in tight engagement with the bodyhook 28 after the containe-r is opened to continue to confine thesealing compound 68 and advantageously prevent its exposure when thecontainer is opened.

As illustrated in FIGS. 9 and 10, the reversely curved cutter guidingsegment 46 of the cover hook 30 serves to advantage in guiding thecutting edge of a circular cutter 86 to effect advantageous opening ofthe container. The circular cutter 86 is moved radially inward androtated by can opener structure (not shown) which does not form a partof this invention. The reversely curved cutter guiding segment 46 guidesthe edge of the cutter 86 into the groove 62 where it is restrained bythe protuberance 82 against axially outward displacement past theprotuberance, thereby guiding the cutter to out through the cutterguiding segment 46 of the cover hook over the curved connecting portion38 of the body hook, as illustrated in FIG. 10. The groove 62 is locatedaxially close- 1y adjacent the abutment segment 48 of the cover hook sothat the cutter 86 engages and glides over the rounded surface of thecurved connecting portion 38 of the body hook, as shown.

The cutter 86 progresses around the end seam 26 to sever the cover hookbetween the protuberance 82 and the outer told 42 of the cover hook. Thecover is then lifted from the container, as shown in FIG. 11, and can besubsequently replaced to reclose the container, if desired.

As shown in FIG. 11, a portion of the cover hook defining theprotuberance 60 remains attached to the severed cover hook fold 42 topreclude exposure of the sealing compound 68 located in an optimumposition within the end seam, as described. This is of decided advantagein containers used to contain food, in that the sealing compound, whichtends to have an unappetizing appearance, is not exposed to view. Thecontainment of sealingcompound against exposure to view is of specialadvantage in food containers which are when opened used as drinking cupsor dishes from which the contents of the containers are consumed.

As previously intimated, the fact that the opened container can beconveniently reclosed by replacement of the severed cover is quiteadvantageous. Upon replacement of the cover, the chuck wall 32 fitswithin the opened end of the container body 22 and the abutment segment48 and projection 82 fit down over the body hook segment 38. In thisconnection, it will be noted, with reference to FIGS. 10 and 11, thatthe severed edge of the projection 82 is turned back under the abutmentsegment 48 so that it is not exposed to contact the hand of the user.The users hand engages only the rounded projection 82 on the removedcover. Similarly, the severed edge 92, FIG. 11, of the severed portionof the cover hook which remains attached to the container body fitsclose against the body hook 28 where it can cause no harm. This safetyfeature, together with the confinement of the sealing compound, asdescribed, afiords special advantages in the use of an opened containeras a drinking cup, for example.

FIGURES 12 to 18 illustrate additional features of the invention whichprovides for a more positive retention of a replaced cover on acontainer body after the container has been opened. In FIGS. 12 to 18container components corresponding to container components previouslydescribed in relation to FIGS. 1 to 11 are identified with the samereference numbers with the addition of the suffix a.

The container 20:: of FIGS. 12 to 18 is manufactured in the same manneras the previously described container 20, except for a modification inthe formation of the end seam 26a which forms in the chuck wall 32a aplurality of circumferentially spaced outwardly protruding pimples orswaged protuberances 100 located near the lower portion of the chuckwall, as shown in FIG. 13.

The end seam 26a is rolled in the same manner as the end seam 26,previously described. The protuberances 100 are formed in the chuck wall32a by the use of a special chuck 102 defining on its periphery 104,FIGS. 13 and 14, which fits within the chuck wall 32a, a number ofcircumferentially spaced protuberances or pimples 105 equal to thenumber of pimples 100 to be formed in the chuck wall 32a. Preferably,four protuberances 106 are formed on the chuck 102 to produce fourpimples 100 in the chuck wall 32a.

The chuck 102 is inserted into the upwardly open cover 24a in aconventional manner, as shown in FIG. 13. Upon rolling of the end seam,the roller 78a used in the second rolling operation forces the chuckwall 32a hard against the periphery 104 of the chuck 102, causing thechuck protuberances 106 to swage adjacent portions of the chuck wall 32aoutwardly to form the protuberances 100.

After the last seam rolling operation, the chuck 102 is extracted fromthe cover 24a. Any tendency the chuck protuberances 106 may have to holdthe cover on the chuck is overcome by operation of a central plunger 108in the chuck, FIG. 14, to force the cover from the chuck.

The container 20a is opened in exactly the same manner as the container20. As illustrated in FIG. 15, the end seam 26a is engaged on oppositesides by a rotary cutter 86a and a platen roller 110 of a can openerforming no part of the present invention. The lower end of the platenroller 100 is somewhat enlarged radially, as shown in FIG. 15, to forman annular swaging protuberance 112. This swaging protuberance engagesthe chuck wall 32a adjacent but somewhat above the juncture of the chuckwall with the central panel 34a of the cover. As the roller 110progresses around the end seam 26a, it swages the adjacent portions ofthe chuck wall 32a and container body 22a radially outward to form abroad annular land or ridge 114 on the chuck wall and an annularindentation 116 in the container body.

This outward swaging of the chuck wall 32a and container body 220 issuperimposed on the outward swaging of these parts by the previouslymentioned chuck protuberances 106.

Upon replacement of the severed cover 244, as shown in FIG. 17, theswaged annular protuberance or ridge 114 in the cover 24a, FIGS. 16 and17, tends to protrude outwardly into the annular indentation 116 in thecontainer body 22a. The effect of this is to yieldably hold the cover24a in its replaced position.

This yieldable retention of the replaced cover on the container body ispowerfully augmented by the action of the circumferentially spacedprotruding pimples 100 formed by the seaming chuck 102. These pimples orprotuberances 100 register along the axis of the cover with the annularswaged protuberance 114 and, upon replacement of the cover, projectoutwardly into engagement with the annular indentation 116 in thecontainer wall, as shown in FIG. 17. The result is to more firmly holdthe replaced cover in place.

As shown in FIG. 12, a knob 120 is attached to the container cover 24aby a self-tapping screw 12.2. This knob may be applied either before orafter the cover 24a is severed from the container body. The knobprovides a convenient means of replacing and removing the cover wherebythe opened container serves most conveniently as a reclosable cannister.

The invention is claimed as follows:

1. The method of making a container comprising form ing a container bodyhaving an incipient body hook on one end thereof, stamping a containercover having a central portion encircled by and connected to the inneredge of an axially extending chuck wall and a generally flat annularseaming panel adjoined to the outer edge of the chuck wall and extendingradially outward therefrom, forming a cover hook curl on the peripheryof the seaming panel on the cover, swaging an annular portion of thecover seaming panel located radially outward from the chuck wall to formin the seaming panel an annular protuberance projecting axially fromadjoining portions of the seaming panel in the direction of the plane ofthe inner edge of the chuck wall and to define an annular groove openingin the opposite direction, placing the cover in covering relation to oneend of the body, and rolling the periphery of the cover and theincipient body hook on the body to form an end seam in which a body hookis completed on the body and a cover is completed on the cover andinterlocked with the body hook.

2. The method of making a container comprising, forming a container bodyhaving an incipient body hook on one end thereof, forming a containercover having a central portion encircled by and connected to the inneredge of an axially extending chuck wall and an annular seaming panelconnected with and extending radially outward from the outer edge of thechuck wall, forming a curl on the periphery of the seaming panel,swaging an annular portion of the seaming panel radially spaced from theseaming panel radius to form on the inner face of the seaming panel anannular protuberance projecting axially away from the radially inwardand the radially outward adjoining annular portions of the seaming panelin the direction in which the central portion of the cover is offsetfrom the seaming panel and to form an annular groove in the face of saidseaming panel opposite from said protuberance, holding the cover so thatthe inner face thereof is turned upwardly and placing a sealing compoundon the inner face of the cover to be confined radially between saidprotuberance and the periphery of said curl, placing the cover incovering relation to one end of the container body on which an incipientbody hook is formed, and rolling the marginal periphery of the containercover to form an end seam in which the periphery of the cover isinterfolded with a body hook on the body and a circumferential grooveopening radially outward is defined in the end seam by the swagedannular portion of the cover.

3. The method of making a container comprising forming a container bodyhaving an incipient body hook on one end thereof, forming a containercover having a central portion encircled by and connected to the inneredge of an axially extending chuck wall and an annular seaming panelconnected with the chuck wall and extending radially outward therefrom,swaging an annular portion of the seaming panel radially spaced from thechuck wall to displace the'swaged annular portion of the seaming panelaxially away from the radially inward and radially outward adjoiningannular portions of the seaming panel toward the plane of the centralportion of the cover, forming a curl on the periphery of the seamingpanel, placing the cover in covering relation to one end of thecontainer body, and rolling the periphery of the cover to form an endseam in which the periphery of the cover is interfolded with a body hookformed on the body and an outwardly open radial groove is defined in theend seam adjacent the axially outward edge thereof by the swaged annularportion of the cover.

4. The method of making a container comprising, forming a container bodyhaving an incipient body hook on one end thereof, forming a containercover having a central portion encircled by and connected to the inneredge of an axially extending chuck wall and an incipient cover hookextending radially outward from the outer edge of said chuck wall andincluding an annular portion which is radially spaced from the chuckwall and swaged to protrude axially from adjoining annular portions ofthe incipient cover hook in the direction in which the central portionof the cover is offset from the incipientcover hook, placing a sealingcompound on the inner surface of the incipient cover hook to be confinedradially between said swaged annular portion of the incipient cover hookand the periphery of the incipient cover hook, placing the cover incovering relation to one end of the container body on which an incipientbody hook is formed, and rolling the marginal periphery of the containercover to form an end seam in which the periphery of the cover isinterfolded with a body hook on the body and a circumferential grooveopening radially outward is defined in the end seam by the swagedannular portion of the cover.

5. The method of making a container comprising, forming a container bodyhaving an incipient body hook on one end thereof, forming a containercover having a central portion encircled by and connected to the inneredge of an axially extending chuck wall and an incipient cover hookextending outwardly from the chuck wall and including an annular portionwhich is radially spaced from the chuck wall and swaged to protrudeaxially from adjoining annular portions of the incipient cover hook inthe direction in which the central portion of the cover is oifset fromthe incipient cover hook, placing the cover in covering relation to oneend of the container body on which an incipient body hook is formed,inserting into the cover to fit within the space encircled by the chuckwall a chuck having a periphery defining protuberances projecting towardthe chuck wall, and rolling the marginal periphery of the containercover to force the periphery of the chuck hard against the chuck wallwhereby the protuberances on the chuck swage outwardly extendingprotuberances in the chuck wall and the incipient cover hook and theincipient body hook are completed to form an end seam in which saidswaged annular portion of the cover hook forms a circumferential cutterguiding groove encircling the axially outer extremity of the body hook.

6. The method of making a container comprising, forming a container bodyhaving an incipient body hook on one end thereof, forming a containercover having a central portion encircled by and connected to the inneredge of an axially extending chuck wall and an incipient cover hookextending outwardly from the chuck wall and including an annular portionwhich is radially spaced from the chuck wall and swaged to protrudeaxially inward from adjoining annular portions of the incipient coverhook, forming a curl on the periphery of the incipient cover hook,placing a sealing compound on the inner surface of the incipient coverhook between said curl and the inwardly swaged annular portion of thecover hook, placing the cover in covering relation to one end of thecontainer body on which an incipient body hook is formed, and workingthe periphery of the cover to form an end scam in which a completedcover hook formed from the incipient cover hook is interfolded with acom- 'pleted body hook formed from the incipient body hook and in whichsaid swaged annular portion of the cover hook forms a circumferentialcutter guiding groove encircling the axially outer extremity of the bodyhook.

7. The method of making a cover member adapted for double seamingconnection with container bodies which comprises shaping the covermember peripherally to conform to the shaping of a cooperative containerbody, providing the cover member with a countersunk central portionprojecting axially of the cover member adapted to form a chuck wall withthe end of the container body, forming a peripheral portion on the covermember extending radially outwardly from said countersunk portion,forming a circumferentially extending rib in said peripheral portion inspaced relation from the countersunk portion and project-ed axially ofthe cover member in the direction of the plane of the countersunkcentral portion, and providing an outer flange at the outer edge of theperipheral portion bent axially of the cover in the direction of saidcountersunk portion adapted in the double seaming operation to bebrought into pressure engagement with the container body to provide apressure seal therewith.

S. The method of making a cover member as defined in claim 7 whichincludes arranging a body of sealing compound on the cover memberbetween the rib and said outer flange.

References Cited by the Examiner UNITED STATES PATENTS 2,311,001 2/ 1943Stewart 22048 2,3 62,846 11/ 1944 OBrien 22048 3,019,938 2/1962 Milleret al. 113121 3,139,211 6/ 1964 Bogner 220-67 CHARLES W. LANHAM, PrimaryExaminer.

R. D. GREFE, Assistant Examiner.

1. THE METHOD OF MAKING A CONTAINER COMPRISING FORMING A CONTAINER BODYHAVING AN INCIPIENT BODY HOOK ON ONE END THEREOF, STAMPING A CONTAINERCOVER HAVING A CENTRAL PORTION ENCIRCLED BY AN CONNECTED TO THE INNEREDGE OF AN AXIALLY EXTENDING CHUCK WALL AND A GENERALLY FLAT ANNULARSEAMING PANEL ADJOINED TO THE OUTER EDGE OF THE CHUCK WALL AND EXTENDINGRADIALLY OUTWARD THEREFROM, FORMING A COVER HOOK CURL ON THE PERIPHERYOF THE SEAMING PANEL ON THE COVER, SWAGING AN ANNULAR PORTION OF THECOVER SEAMING PANEL LOCATED RADIALLY OUTWARD FROM THE CHUCK WALL TO FORMIN THE SEAMING PANEL AN ANNULAR PROTUBERANCE PROJECTING AXIALLY FROMADJOINING PORTIONS OF THE SEAMING PANEL IN THE DIRECTION OF THE PLANE OFTHE INNER EDGE OF THE CHUCK WALL AND TO DEFINE AN ANNULAR GROOVE OPENINGIN THE OPPOSITE DIRECTION, PLACING THE COVER IN COVERING RELATION TO ONEEND OF THE BODY, AND ROLLING THE PERIPHERY OF THE COVER AND THEINCIPIENT BODY HOOK ON THE BODY TO FORM AN END SEAM IN WHICH A BODY HOOKIS COMPLETED ON THE BODY AND A COVER IN COMPLETED ON THE COVER ANDINTERLOCKED WITH THE BODY HOOK.